I am helping prepare a team for First Lego League and the new EV3 kit is what will be used. We are currently teaching the kids with NXT 2.0 kits that we have using the NXT-G IDE. It appears that we cannot get the [free] EV3 Home Edition software until September 1, 2013, losing important time and requiring some learning curve. Is it possible for us to continue using NXT-G software to program the new EV3 kit when it arrives?

I found out that the Educational Software is available now, for a price. The Home Edition software is available free on Sept 1, 2013. First Lego League teams who buy the EV3 kit get a team license of the EV3 software.
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Jim JonesAug 2 '13 at 15:37

I think I found the answer from a post back in January (unless things have changed since then). It came from user named bungeshea, who said "it is unlikely that NXT-G will work with EV3 bricks as EV3 bricks run a custom build of Linux, whereas older bricks run a custom firmware". So I assume the answer is NO (unless someone creates an NXT firmware upgrade that can emulate the EV3 API...highly unlikely).